TinyTrak3Plus
is an APRSTM GPS position encoder which, when connected to a serial GPS and a radio, will transmit its location at an adjustable rate.
TinyTrak3Plus is the fourth generation in TinyTrak series, and is available as a kit construction project, or as a built and tested unit, providing an inexpensive way to build a
mobile tracker without the need for a full TNC.
It is configured by connecting to a computer's serial port, and running a
simple configuration tool which allows setting of all user options. After that, the computer can be disconnected, and a GPS connected in its place for operation.
TinyTrak3Plus has the following features:

Supports SmartBeaconing, which adjusts transmission rates to speed and turning.

Can transmit position in MIC-E, NMEA, or APRS ASCII text format.

Two configurations, with all user options switchable.

Burst after voice / Send Position Now input.

Handles position resolution down to 7 inches.

Also consider: TinyTrak SMT, the surface mount version of TinyTrak3, and
TinyTrak4, with the ability to encode and decode packets.
TinyTrak3Plus User's Manual and Windows Configuration Software is available. Download TINYTRAK3PLUS.ZIPRight click the link and choose "Save As..."

TinyTrak3Plus Built and Tested with Case -
For those not interested in soldering together the kit.

Without a GPS

$33
TinyTrak3Plus Kit

$42
TinyTrak3Plus Built

Combo with Byonics GPS - Includes a Byonics GPS5 with the SiRFstar III chipset.

$98
TinyTrak3Plus Kit and GPS Combo

$107
TinyTrak3Plus Built and GPS Combo

GPS WARNING: The Byonics GPS above is a 5 volt GPS receiver. Do not connect directly to 12 volts or it will be destroyed.
If buying with a TinyTrak3Plus kit, configure J7 for 5 volts (the bottom two square pads soldered together).
If buying with a TinyTrak3Plus built and tested, this will already be done for you. Do not use these GPS receivers directly with the older TinyTrak3 (non-Plus version).
RF Related Resets:
If you see the TinyTrak3 yellow and green LEDs flash 3 times together, followed by a quick flash of the red PTT LED, and then it repeats, this is usually a sign of the TinyTrak3 resetting due to too much local RF energy.
Solutions to this problem are lower RF power, moving the antenna further away, and/or toroid clmap filters on the cables leading to the TT3. One other possible cause is a low battery, or a short in the radio cable.
Radio and Power Cables available for many common radios. Click
HERE!

TT USB Cable - $20.
This USB cable will connect a TinyTrak3Plus or TinyTrak4 to a computer USB port for configuring.
In addition, if the TinyTrak is set for 5V on J7 (TT3+) or JP6 (TT4) to power a GPS, this cable will also power the TinyTrak from the computer.
It is a USB A to DB-9 female, and is basically a USB to serial adapter plus a F-F null modem cable,
with the bonus of providing 5V to power the TinyTrak via pin 4.
Drivers can be found HERE.

A Gender Changer and a Null Modem Adapter, or the TT USB cable above, is needed to connect a TinyTrak3Plus to the computer for configuration.
TinyTrak3 Chip - $18.
This is a replacement TinyTrak3/TinyTrak3Plus chip. Also, with this chip, a TinyTrakII can be upgraded to all the functionality of a TinyTrak3.Downloads:

Please do not distribute any TinyTrak software, firmware, or documentation without written permission from the author.
TinyTrak3 is also available in Surface Mount Form
The TinyTrak links page has references for support, international distributors, and ways others have used TinyTrak3.
The TinyTrak3 wiring page shows example of how to wire connectors to various radios.
FAQ: